Dresser-Rand – Hanwha Chemical PE1 Revamping Compressor Vessels (18 units)

Lmart fabricated 18 compressor auxiliary vessels for Dresser-Rand's supply to Hanwha Chemical's PE1 polyethylene plant revamping project. The package covered the full complement of intercoolers, after coolers, and 1st-through-3rd-stage suction and discharge volume bottles — all ASME U stamped with KGS Korean certification.

Client	Dresser-Rand (now part of Siemens Energy)
Owner	Hanwha Chemical Corporation
Project	PE1 Revamping – Compressor Auxiliary Vessels
Equipment (18 units)	2 × Inter Cooler-1 (DN 273) 2 × Inter Cooler-2 (DN 219) 2 × After Cooler (DN 168) 2 × 1st Stage Suction Volume Bottle (DN 406) 2 × 1st Stage Discharge Volume Bottle (DN 406) 2 × 2nd Stage Suction Volume Bottle (DN 273) 2 × 2nd Stage Discharge Volume Bottle (DN 273) 2 × 3rd Stage Suction Volume Bottle (DN 219) 2 × 3rd Stage Discharge Volume Bottle (DN 219)
Design Code	ASME U, KGS
Key Materials	Shell – SA516 Gr.70; Tubes – SA240 304

Customer Background

Dresser-Rand is a recognized participant in the chemical manufacturing sector. The company’s operations involve process equipment that must meet stringent safety, quality, and performance standards demanded by the industry and regulatory authorities.

This project required the equipment engineered to ASME U, KGS standards using Shell – SA516 Gr.70; Tubes – SA240 304, reflecting the technical demands of the application and the client’s commitment to equipment reliability and regulatory compliance.

Challenges and Engineering Requirements

System Integration and Package Design

Compressor packages are not standalone machines — they are integrated systems combining the compressor, driver, interstage coolers, separators, control panels, piping, and instrumentation on a common skid frame. Every component must be engineered to work together: gas flow paths optimized to minimize pressure losses, vibration isolation designed to prevent resonance between rotating equipment and the skid structure, and control logic programmed to protect the compressor across all operating conditions.

Process Gas Compatibility

Compressing the equipment service in the chemical manufacturing sector requires materials and seal systems compatible with the specific gas composition, including trace contaminants that can cause accelerated corrosion, elastomer degradation, or lubricant breakdown. The design must address gas properties at each compression stage — temperature rise, condensation risk, and molecular weight changes for gas mixtures.

Noise, Vibration, and Mechanical Integrity

Reciprocating and screw compressors generate significant dynamic forces that propagate through the skid structure to the foundation. The package design must account for pulsation dampening, piping flexibility analysis, and anchor bolt sizing to prevent fatigue failures in connected piping and instrumentation. Acoustic enclosures or silencers may be required to meet plant noise limits.

Why Dresser-Rand Selected Lmart

Turnkey package engineering. Lmart provides complete compressor package engineering including process simulation, mechanical design, structural analysis of the skid frame, piping stress analysis, and control system programming — delivered as a factory-tested, ready-to-install module.

Multi-gas experience. Lmart has delivered compression packages for natural gas, BOG (boil-off gas), propylene, hydrogen, chloromethane, and other process gases, each with its own material compatibility, seal technology, and safety requirements.

Workshop integration and testing. Complete packages are assembled, piped, wired, and functionally tested at Lmart’s facility before shipment. Factory acceptance testing includes mechanical run tests, control loop verification, and safety system validation.

Engineering and Manufacturing Solution

Lmart engineered and fabricated the equipment for Dresser-Rand to ASME U, KGS using Shell – SA516 Gr.70; Tubes – SA240 304. The scope of supply included complete detail design, material procurement, fabrication, inspection, testing, and documentation.

Key engineering considerations for this project included thermal-hydraulic performance optimization, material selection for the specific process environment, and compliance with ASME U, KGS requirements for design, fabrication, and inspection.

The equipment was manufactured at Lmart’s Zhangjiagang facility, which provides full-cycle fabrication capabilities including plate rolling, head forming, machining, welding (SAW, GTAW, SMAW), post-weld heat treatment, and NDE — all under a single quality management system.

Quality Control and Project Execution

All equipment was manufactured under Lmart’s ISO 9001-certified quality management system with the following key inspection milestones:

• Material verification: Incoming inspection of all plates, forgings, and fittings against mill certificates; PMI spot checks on alloy materials
• Welding quality: All welding performed by qualified welders using approved WPS/PQR; NDE per ASME U, KGS requirements including RT/UT on pressure-retaining welds
• Dimensional inspection: In-process dimensional checks at shell rolling, head forming, and final assembly stages
• Pressure testing: Hydrostatic test to ASME U, KGS requirements, witnessed by the authorized inspector and/or client representative
• Documentation package: Complete data book including material certificates, weld maps, NDE reports, dimensional records, and test certificates

Equipment was delivered to Dresser-Rand’s project site, meeting the project schedule requirements.

Results and Business Impact

Lmart successfully delivered 18 units of the equipment to Dresser-Rand, meeting the project’s quality, schedule, and documentation requirements. The equipment was manufactured in Shell – SA516 Gr.70; Tubes – SA240 304 to ASME U, KGS standards, with full documentation packages accepted by the client and applicable inspection authorities.

This project reinforces Lmart’s position as a qualified manufacturer for chemical manufacturing applications, demonstrating the company’s ability to deliver equipment that meets international quality and certification standards.

Customer Voice

“The equipment was delivered on schedule and the documentation package was complete. The quality of fabrication met our inspection requirements.”

— Dresser-Rand project team (paraphrased from project review)

Note: Lmart respects client confidentiality. Specific contact references are available upon request during the qualification process.